Most academies fall into one format or the other by accident — a maths tutor who only ever teaches one child, a language school that only ever runs groups. But the two aren't rivals. They're different jobs, and plenty of academies are healthiest running both. The trap is running them the same way. Here's what each format actually demands, and how to keep both straight under one roof. Two shapes, not one One-to-one is depth. A single student, the teacher's full attention, a pace set entirely by them. A group class is a different animal: energy, peers, a bit of healthy comparison, and a teacher who now manages a room as well as a lesson. Neither is better than the other. They fail for different reasons, which is exactly why they need different scaffolding. What one-to-one demands The strength of one-to-one is that everything bends to the student. The weakness is that it's costly per head and leans entirely on a single relationship. So the record does more work here, not less. One clean record per student — their level, their history, what they were set last week — so no session starts from a blank page. The same assigned teacher each week, because the relationship is the product. Attendance that still counts: a no-show in one-to-one is a whole slot lost, and often an unbillable one. Assignments and progress notes carry the student between sessions, so a weekly hour builds on the last instead of resetting. What group classes demand A group lives or dies on logistics. Everyone has to be in the same room at the same moment, which across time zones is a puzzle on its own. Get eight people in and the payoff is real — practice, conversation, momentum — but only if the mechanics disappear. A one-to-one lesson forgives a clumsy tool. A group of eight does not — every second of friction is multiplied by everyone in the room. Small-group rooms sized for practice, not a two-hundred-seat broadcast nobody speaks in. A shared whiteboard and screen share so the group works on the same thing together. Attendance captured per student automatically, because a register of eight taken by hand simply never happens. The room does different work in each In one-to-one, the classroom is a shared page — one whiteboard, two people, close work. In a group, the same room has to do more: a front-of-class space plus small-group rooms to split pairs off for practice, then bring them back. It's the same live classroom in the browser either way, with no app to install, but you lean on different parts of it depending on how many faces are in the room. Attendance and money behave differently The two formats also bill differently. One-to-one tends to price by the hour, per slot, which makes each teacher's hourly rate and each missed session matter directly to the accounts. Group classes usually price per head, per term. Both should run through the same subscription billing, tied to the student record, so a full timetable of mixed formats doesn't fracture into two bookkeeping systems. Excused absences, in both, stay out of the attendance rate — illness shouldn't dent a student's record whether they were one of one or one of eight. Running both without chaos The reason academies avoid mixing formats is fear of the mess — a teacher double-booked between a group and a private lesson, two timetables that don't agree. That's a tooling problem, not a reason to specialise. Put both on recurring timetables that generate their own sessions, on a platform that refuses to book one teacher into two rooms at once, and the mix stops being risky. Run one-to-one for depth and groups for momentum, and let each be what it's good at. The academies that offer both aren't working twice as hard. They're using one system that already knows the difference.